00466nam a2200145 a 450000500170000000800410001704100080005808200120006610000360007824500850011426400380019930000280023765000400026570000150030520260717091352.0260717s1986    ii            000 0 eng d  aeng04a572.5451 aBroughton, William (William J.)10aNitrogen fixation : Vol. 4: Molecular Biology /cBroughton, William (William J.) 1aOxford :bClarendon Press,c1986.  ax, 321 s. : ill. 24 cm. 4aAnatomi Fysiologi Morfologi Biologi1 aPuhler, A.